11831 AIRPORT RD WHOLE SITE FILE 2020-01-21

Bothell, the City of Everett, and Unincorporated Snohomish County for the following bid items: "SR 527 at 208th Street SE (SR 524) Temporary System AND Traffic Signal Modifications, Complete,"which shall include the following two systems: "SR 527 at 208th Street SE (SR 524) Temporary Traffic Signal System, Complete." "SR 527 at 208th Street SE (SR 524)Traffic Signal Modifications, Complete." "Airport Road at SR 99 (Evergreen Way)Traffic Signal Modifications, Complete." "Airport Road at 112th Street SW Traffic Signal Modifications, Complete." "Airport Road at Kasch Park Road Traffic Signal Modifications, Complete." Section 8-20.3(14)B, the first paragraph is supplemented with the following: Signal head shall be covered before the signal turn-on. If there are yellow tapes on the back plates, the whole assembly shall be covered completely. Section 8-20.3(14)C is supplemented with the following: Item 4 is supplemented as follows: The loop locations shall be marked on the pavement by the Contractor and approved by the Engineer prior to sawcutting.At no point shall any of the sawcuts pass closer than 12 inches to any utility cover. Item 6 is supplemented as follows: Loop installation shall not take place in temperatures below 40°F. Item 7 is supplemented as follows: The sawcuts shall be of uniform depth and any sharp edges, abrasions, or ridges shall be removed prior to placing the wire. Sawcut Cleaning The high pressure washer shall operate at 1000 psi minimum pressure as certified by the manufacturer's label on the machine or as measured by an in line pressure gauge. All requirements of Section 1-07.15, "Temporary Water Pollution/Erosion 34 Control" shall be observed as specified in the Contract and in the Plans when the sawcut cleaning is performed. Item 11 is supplemented as follows: Loop detector sealant shall conform to one of the following specifications, chosen based on Case A or Case B application: Case A Induction Loop Detectors installed and sealed into the finish lift of asphalt shall conform to these criteria: Swift Green Line—Corridor Stations Special Provisions SP133 May 2017